/* ============================================
   ADG Phase 4-5: Bento Grid + Scroll Reveal + Search
   ============================================ */

/* ── Scroll Reveal ── */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}
/* Stagger children within revealed sections */
.scroll-reveal.revealed .bento-card:nth-child(1) { transition-delay: 0s; }
.scroll-reveal.revealed .bento-card:nth-child(2) { transition-delay: 0.08s; }
.scroll-reveal.revealed .bento-card:nth-child(3) { transition-delay: 0.16s; }
.scroll-reveal.revealed .bento-card:nth-child(4) { transition-delay: 0.24s; }
.scroll-reveal.revealed .bento-card:nth-child(5) { transition-delay: 0.32s; }
.scroll-reveal.revealed .bento-card:nth-child(6) { transition-delay: 0.40s; }
.scroll-reveal.revealed .bento-card:nth-child(7) { transition-delay: 0.48s; }
.stagger-child {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.stagger-child.revealed {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
}
.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 20%;
    width: 60%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(124,106,255,0.4), transparent);
    border-radius: 1px;
}
.section-header .section-sub {
    color: var(--text-muted, #8b949e);
    font-size: 0.9rem;
    margin-top: 4px;
}

/* ── Bento Grid ── */
.bento-section {
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 20px;
}
#bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    grid-auto-rows: minmax(180px, auto);
}
.bento-card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 28px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(13, 17, 23, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    text-decoration: none;
    color: #fff;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.3s ease,
                box-shadow 0.4s ease;
    cursor: pointer;
}
/* Bento card shine sweep */
.bento-card::after {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: linear-gradient(115deg, transparent 40%, rgba(255,255,255,0.02) 45%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0.02) 55%, transparent 60%);
    transform: translateX(-100%);
    transition: transform 0.7s ease;
    pointer-events: none;
    z-index: 2;
}
.bento-card:hover::after {
    transform: translateX(50%);
}
.bento-card:hover {
    transform: translateY(-8px);
    border-color: var(--cat-color, rgba(255,255,255,0.15));
    box-shadow: 0 20px 60px rgba(0,0,0,0.35),
                0 0 0 1px var(--cat-color, transparent),
                0 0 30px color-mix(in srgb, var(--cat-color, #7c6aff), transparent 85%),
                inset 0 1px 0 rgba(255,255,255,0.06);
}
.bento-large {
    grid-row: span 2;
}
.bento-medium {
    grid-row: span 1;
}
.bento-small {
    grid-row: span 1;
}

/* Glow */
.bento-glow {
    position: absolute;
    top: -30%;
    right: -30%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--cat-color, #7c6aff) 0%, transparent 70%);
    opacity: 0.08;
    pointer-events: none;
    transition: opacity 0.3s;
}
.bento-card:hover .bento-glow {
    opacity: 0.18;
}

.bento-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}
.bento-icon {
    font-size: 2rem;
}
.bento-count {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--cat-color, #7c6aff);
    background: rgba(255,255,255,0.05);
    padding: 4px 10px;
    border-radius: 100px;
    letter-spacing: 0.05em;
}
.bento-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 2px;
    font-family: var(--font-zh, sans-serif), var(--font-sans, sans-serif);
}
.bento-en {
    font-size: 0.7rem;
    color: var(--text-muted, #8b949e);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.bento-desc {
    font-size: 0.8rem;
    color: var(--text-secondary, #b0b0b0);
    line-height: 1.5;
    flex-grow: 1;
}
.bento-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
}
.bento-tag {
    font-size: 0.65rem;
    background: rgba(255,255,255,0.06);
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--text-secondary, #b0b0b0);
}
.bento-arrow {
    position: absolute;
    bottom: 20px;
    right: 24px;
    font-size: 1.2rem;
    color: var(--cat-color, #7c6aff);
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity 0.3s, transform 0.3s;
}
.bento-card:hover .bento-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ── Spotlight Carousel ── */
.spotlight-section {
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 20px;
    position: relative;
}
.spotlight-track {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 10px 0 20px;
    scroll-behavior: smooth;
}
.spotlight-track::-webkit-scrollbar { display: none; }
.spotlight-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.3s, background 0.3s;
}
.spotlight-arrow:hover {
    border-color: var(--c-brand, #7c6aff);
    background: rgba(124, 106, 255, 0.15);
}
.spotlight-prev { left: -4px; }
.spotlight-next { right: -4px; }
.spotlight-card {
    flex-shrink: 0;
    width: 260px;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: rgba(13, 17, 23, 0.6);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    text-decoration: none;
    color: #fff;
    transition: transform 0.3s, border-color 0.3s;
    position: relative;
}
.spotlight-card:hover {
    transform: translateY(-4px);
    border-color: var(--spot-color, rgba(124, 106, 255, 0.3));
}
.spotlight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}
.spotlight-info h4 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 4px;
}
.spotlight-info p {
    font-size: 0.7rem;
    color: var(--text-muted, #8b949e);
    line-height: 1.4;
}
.spotlight-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    background: linear-gradient(135deg, #7c6aff, #06b6d4);
    color: #fff;
    font-size: 0.55rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 100px;
    letter-spacing: 0.1em;
}

/* ── Command Palette (⌘K Search) ── */
.cmd-palette-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 10000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}
.cmd-palette-overlay.active {
    opacity: 1;
    visibility: visible;
}
.cmd-palette {
    width: 560px;
    max-width: 92vw;
    max-height: 480px;
    background: rgba(20, 24, 30, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    transform: scale(0.95) translateY(-10px);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.cmd-palette-overlay.active .cmd-palette {
    transform: scale(1) translateY(0);
}
.cmd-input-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.cmd-input-wrap svg {
    flex-shrink: 0;
    color: var(--text-muted, #8b949e);
}
.cmd-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: #fff;
    font-size: 1rem;
    font-family: var(--font-sans, sans-serif);
}
.cmd-input::placeholder {
    color: var(--text-muted, #8b949e);
}
.cmd-results {
    max-height: 380px;
    overflow-y: auto;
    padding: 8px;
}
.cmd-results::-webkit-scrollbar { width: 4px; }
.cmd-results::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
.cmd-result-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 10px;
    text-decoration: none;
    color: #fff;
    transition: background 0.15s;
    cursor: pointer;
}
.cmd-result-item:hover, .cmd-result-item.active {
    background: rgba(124, 106, 255, 0.12);
}
.cmd-result-icon {
    font-size: 1.3rem;
    width: 32px;
    text-align: center;
    flex-shrink: 0;
}
.cmd-result-info {
    flex: 1;
    min-width: 0;
}
.cmd-result-info h4 {
    font-size: 0.85rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.cmd-result-info p {
    font-size: 0.65rem;
    color: var(--text-muted, #8b949e);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.cmd-result-cat {
    font-size: 0.6rem;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(255,255,255,0.05);
    color: var(--text-muted, #8b949e);
    flex-shrink: 0;
}
.cmd-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted, #8b949e);
    font-size: 0.85rem;
}
.cmd-footer {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 20px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 0.65rem;
    color: var(--text-muted, #8b949e);
}
.cmd-footer kbd {
    display: inline-block;
    padding: 1px 5px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 4px;
    font-family: var(--font-mono, monospace);
    font-size: 0.6rem;
}

/* ── Built Different Section ── */
.built-different {
    max-width: 1200px;
    margin: 80px auto;
    padding: 0 20px;
    text-align: center;
}
.built-different h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 16px;
}
.tech-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 24px;
}
.tech-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 100px;
    color: var(--text-secondary, #b0b0b0);
    font-size: 0.8rem;
    font-weight: 500;
    transition: border-color 0.3s, color 0.3s, background 0.3s, transform 0.3s;
}
.tech-pill:hover {
    border-color: var(--c-brand, #7c6aff);
    color: #fff;
    background: rgba(124,106,255,0.08);
    transform: translateY(-2px);
}

/* ── Footer upgrade ── */
.footer-tagline {
    text-align: center;
    padding: 60px 20px 40px;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--c-brand, #7c6aff), var(--c-ailab, #06b6d4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Responsive ── */
@media (max-width: 900px) {
    #bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .bento-large { grid-row: span 1; }
    .cmd-palette { max-width: 95vw; }
}
@media (max-width: 600px) {
    #bento-grid {
        grid-template-columns: 1fr;
    }
    .section-header h2 { font-size: 1.6rem; }
    .spotlight-card { width: 220px; }
}